Notice that some of the included disks appear to be the directed attached volumes on my ESXi host (the ones that are 67 GB in size, and that really small 20 MB disk). Since I don’t know for sure what these disk are or if they support RoundRobin, I want to exclude them too. I’ll do so by adding another Where clause that selects disks with a CapacityGB greater than or equal to 100 GB:

A few minutes later and all of my LUNs are now configured to use Round Robin. I was able to make this change on production systems, without going into maintenance mode, and without a disruption in service.